3 Reasons why easy chess puzzles sometimes appear hard!

The theme (pattern) used in the puzzle is not fixed in your mind. Maybe you are familiar with the pattern but you have not seen it often enough in order that it became a second nature to you.

You didn’t follow the correct calculation method!

Forgetting pawn moves in tactical combinations. This is what the example above mainly illustrates. Tactical combinations mainly involve pieces and it is easy to overlook pawn moves that can be effective in a tactic.